Fast refocusing lens based on ferroelectric liquid crystals | Zendy

Sebabrata Mukherjee | Zendy; Zhengnan Yuan | Zendy; Zhibo Sun | Zendy; Anran Li | Zendy; Chen-bing Kang | Zendy; Hoi Sing Kwok | Zendy; Abhishek Kumar Srivastava | Zendy

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Fast refocusing lens based on ferroelectric liquid crystals

Author(s) -

Sebabrata Mukherjee,

Zhengnan Yuan,

Zhibo Sun,

Anran Li,

Chen-bing Kang,

Hoi Sing Kwok,

Abhishek Kumar Srivastava

Publication year - 2021

Publication title -

optics express

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.417112

Subject(s) - optics , liquid crystal , lens (geology) , focal length , ferroelectricity , materials science , millisecond , accommodation , polarization (electrochemistry) , response time , microsecond , optoelectronics , computer science , physics , computer graphics (images) , chemistry , astronomy , dielectric

Optical devices like virtual reality (VR) headsets present challenges in terms of vergence-accommodation conflict that leads to visual fatigue for the user over time. Lenses available to meet these challenges include liquid crystal (LC) lenses, which possess a response time in the millisecond range. This response time is slow, while accessing multiple focal lengths. A ferroelectric liquid crystal (FLC) has a response time in the microsecond range. In this article, we disclose a switchable lens device having a combination of the fast FLC-based polarization rotation unit and a passive polarization-dependent LC lens. A cascaded combination of three such lens units allows access to eight different focal points quite rapidly and can be a convenient device for VR applications.

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